/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2021 jPOS Software SRL
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.util;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import org.jpos.iso.ISOUtil;

import java.io.PrintStream;
import java.util.Arrays;
import java.util.Collection;

/**
 * <p>
 * A simple general purpose loggeable message.
 * </p>
 *
 * @author Hani S. Kirollos
 * @version $Revision$ $Date$
 */
public class SimpleMsg implements Loggeable {

    static final String STACKTRACE_EXTRA_INDENT = "    ";

    static final String STACKTRACE_TAB_REPLACE = STACKTRACE_EXTRA_INDENT + STACKTRACE_EXTRA_INDENT;

    String tagName;
    String msgName;
    Object msgContent;

    public SimpleMsg(String tagName, String msgName, Object msgContent) {
        this.tagName = tagName;
        this.msgName = msgName;
        if (msgContent instanceof byte[])
            this.msgContent = ISOUtil.hexString((byte[]) msgContent);
        else
            this.msgContent = msgContent;
    }

    public SimpleMsg(String tagName, Object msgContent) {
        this(tagName, null, msgContent);
    }

    /**
     * dumps message
     *
     * @param p      a PrintStream usually supplied by Logger
     * @param indent indention string, usually suppiled by Logger
     * @see org.jpos.util.Loggeable
     */
    @Override
    public void dump(PrintStream p, String indent) {
        String inner = indent + "  ";
        p.print(indent + "<" + tagName);
        if (msgName != null)
            p.print(" name=\"" + msgName + "\"");

        Collection cl = null;
        if (msgContent instanceof Object[])
            cl = Arrays.asList((Object[]) msgContent);
        else if (msgContent instanceof Collection)
            cl = (Collection) msgContent;
        else if (msgContent instanceof Loggeable)
            cl = Arrays.asList(msgContent);
        else if (msgContent instanceof Throwable)
            cl = Arrays.asList(msgContent);
        else if (msgName != null && msgContent == null) {
            p.println("/>");
            return;
        } else if (msgName != null)
            cl = Arrays.asList(msgContent);
        else if (msgContent != null)
            p.print(">" + msgContent);
        else {
            p.println("/>");
            return;
        }

        if (cl != null) {
            p.println(">");
            for (Object o : cl) {
                if (o instanceof Loggeable)
                    ((Loggeable) o).dump(p, inner);
                else if (o instanceof Throwable)
                    p.print(formatThrowable(indent, (Throwable) o));
                else
                    p.println(inner + o);
            }
            p.print(indent);
        }

        p.println("</" + tagName + ">");
    }

    private String formatThrowable(String indent, Throwable t) {
        String inde = indent + STACKTRACE_EXTRA_INDENT;
        try (
                OutputStream os = new ByteArrayOutputStream();
                PrintStream ps = new PrintStream(os);
        ) {
            // indent stack trace first line
            ps.print(inde);
            t.printStackTrace(ps);

            String res = os.toString();
            res = res.replace("\n\t", "\n" + inde + STACKTRACE_TAB_REPLACE);
            res = res.replace("\nCaused by:", "\n" + inde + "Caused by:");
            return res;
        } catch (IOException ex) {
            return ""; // it should never occur for ByteArrayOutputStream
        }
    }

    public void setMsgContent(Object msgContent) {
        this.msgContent = msgContent;
    }

    public Object getMsgContent() {
        return msgContent;
    }
}
